Collapsible door, partition, and the like and operating mechanism therefor



A.- BOMBELLI.

COLLAPSIBLE DOOR, PARTITION, AND THE LIKE'AND OPERATING MECHANISMTHEREFOR.

1 APPLICATION FILED FEB. 10. 1917.

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COLLAPSIBLE DOOR, PARTITION, ANDTHE LIKE AND OPERATING MECHANISMTHEREFOR.

APPLICATION FILED FEB. I0, 1917.

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UNITED STATES PATENT OFFICE.

ANGELO BOMBELLI, or MILAN, ITALY.

COLLAPSIBLE DOOR, PARTITION, AND THE LIKE AND OPERATING MECHANISMTHEREFOR.

nism Therefor, of which the following is a specification.

This invention relates to collapsible doors, partitions and the like andoperating mechanism therefor and is more particularly intendedforclosing high or wide openings or both high and wide openings ofpremises such as hangars, garages, warehouses, etc., which enables theclosing and opening to be effected more easily and quickly, at the sametime insuring the strength and rigidity of the parts and of the wholedoor structure.

It is particularly suitable for cases where a fluid tight closureexcluding air and moisture is not required, as in the case of hangars.Fluid-tightness can also be obtained, if necessary, by the aidofsuitably arranged supplementary closures. The accompanying drawingshows, by way of example, a movable door or partition for closing thedoors of a hangar, comprising two parts slidable in opposite directions,

each of which may be closed .up into a narrow space near the side postsof the door.

Figure 1 shows the partition in elevation in two parts, one part beingshown in the open position and the other part in the closed position.

Fig. 2 is an elevation drawn to an enlarged scale of the closed partshown in Fig. 1. F i g. 3 is a plan of Fig. 2. Fig. 4 is a crosssectio'n drawn to an enlarged scale of one of the door-plates. Theconstructional details may vary from those shown without departing fromthe nature and scope of the present invention.

Referring to the drawing a, a, a arepivot g at the top and a pivot h atthe bottom, which pivots pass through the central Specification ofLetters Patent.

Application filed February 10, 1917. Serial No. 147,971.

points of rods 2', j jointed together at their extremities and forming,with the screens a, a collapsible lazy tongs arrangement the links ofwhich. are pivoted at g and h.

The links adjacent to the post are mounted on a vertical pivot. Z.adjacent to the screen 6, so that by rotating the screen 6 about thesaid pivot Z the links, when opening and closing, cause rotation of thescreens about their pivots, and consequently they approach or recedefrom the posts with a speed that increases in passing from the screennearest to the post that is from screen I) to that farthest away.

In order to facilitate operating, the screens may be provided inside oroutside the partition with handles m, 'n.

The sections or screens a are preferably given a greater Width thanwould be necessary in order to cover the opening to'be closed b thedoor, so that the door, when fully c osed, has a corrugated appearanceas shown in Fig. 3, and is therefore better able to withstand thepressure of the wind.

A small door 12, may be provided in one of the screens, so as to allowof access to the hangar without it being necessary to open the door.

The lower pivot h of the screens a is provided with a part g adapted tocarry a pulley, roller, ora ball that rolls movable in a guiding grooveout in the door sill 1'.

Each pivot g is rotatably mounted in its bracket 9' which it supportsand carries a forked support t or t, said supports being arranged inalternate sequence as shown in Fig. 2. In the supports t and t aremounted sets of pulleys u, u and u, u respectively, arranged to run onguides o, v. respectively, the guides v, v being suitably supportedabove the door and extending between the door posts on each side of thehangar, or other premises.

In order to economize space the supports t and t are made in difl'erentlengths while the tracks or guides 41, o are situated at differentheights. See Figs. 2 and 4.

. As shown at the left hand side of Fig. 1, the screens may, in the openposition, be arranged at right angles to the door sill, without theadjacent pulleys fouling one another and preventing the complete openingof the door or partition. a

I The guides 12, 4; may be mounted laterally on an architrave a. v

If desiredeither or both sets of rods 2', 9'

may be employed each set being jointed and forming a lazy tongsarrangement connected to the screens. Instead of consisting of twoleaves capable of contracting and designed to approach and recede fromone another, the door or partition may consist of a single leafextending right across the opening and being, when in the closed state,folded against one of the posts. In the case of small doors orpartitions consisting of a limited number of screens the assemblinglinks might also be omitted.

What I claim and desire to secure by Letters Patent of the United Statesis 2- 1. The combination, with a frame having two vertical side postsand two horizontal tracks arranged at different levels near the top ofsaid frame, of a folding door comprising a plurality 'of sectionspivoted to one another along their vertical edges, one of said sectionshaving one vertical edge pivoted to said frame, a series of pivotedlevers con nected with the frame and with the individual door' sectionsin such a manner as to form therewith a system of lazy tongs, guidingmeans pivotally connected with each door section at its point ofattachment to the pivoted levers, said means including rollers engagingsaid tracks, the rollers engaging one track alternating with the rollersengaging the other track.

2. The combination with a frame having two vertical side parts and twohorizontal tracks arranged at different levels near the top of saidframe, of a folding door comprising a plurality of sections pivoted toone another along their vertical edges and having each section of such awidth that the door when fully closed is only partially unfolded andoneof said sections having one vertical edge pivoted to said frame, of aseries of pivoted levers connected with the frame and with theindividual door sections in such a manner as to form therewith a systemof lazy tongs, of guiding means pivotally connected wlth each doorsection at its point of attachment to the pivoted levers, said meansincluding rollers engaging said tracks, the rollers engaging one trackalternating with the rollers engaging the other track.

In testimony whereof I aflix my signature.

ANGELO BOMBELLI.

